Anti-precipitation solar photo-thermal system based on graphene nanofluid and control method of anti-precipitation solar photo-thermal system
A technology of nanofluid and solar collector, applied in the field of anti-precipitation solar thermal system, can solve the problems of poor stability of graphene nanofluid, achieve the effect of improving comprehensive utilization efficiency and solving poor stability
Active Publication Date: 2019-11-05
CHINA UNIV OF MINING & TECH
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[0004] The purpose of the present invention is to provide an anti-precipitation solar thermal system based on graphene nanofluids, improve the characteristics of graphene nanofluids that are easy to precipitate, and solve the problem of poor stability of graphene nanofluids in actual use
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[0026] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0027] Such as figure 1 As shown, an anti-precipitation solar thermal system based on graphene nanofluid includes a liquid storage tank 3, a solar heat collector 14, a heat exchanger 16, and a controller 17. The liquid storage tank 3, solar heat collection The device 14 and the heat exchanger 16 are connected in sequence to form a nanofluid circulation loop.
[0028] Such as Figure 1 to Figure 3 As shown, the liquid storage tank 3 includes a tank cover 31, an upper tank body 32, and a lower tank body 33 that are sequentially arranged from top to bottom. The tank cover 31 has an upwardly convex hemispherical structure. The upper tank body 32 is a cylindrical structure, the lower tank body 33 is a downwardly convex hemispherical structure, the tank cover 31 and the upper tank body 32, the upper tank body 32 and the lower tank body 33 are respectively p...
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The invention discloses an anti-precipitation solar photo-thermal system based on graphene nanofluid and a control method of the anti-precipitation solar photo-thermal system. An emitter, a detector and a stirring device are arranged in a liquid storage tank provided by the system, the emitter emits light beams at regular time, and light rays subjected to absorption, reflection and scattering by the nanofluid are irradiated onto the detector in the transmission process; the operation of the stirring device is regulated through the transmissivity of the transmission light; when the transmissionrate of the nanofluid is higher than a set upper limit value, the stirring device is started by a controller to disperse the part of particles to be agglomerated and precipitated, and thus relativelystable suspension liquid is formed again; and when the transmission rate is lower than or equal to an initial transmission rate of the nanofluid, the stirring device is turned off by the controller,so that the energy-saving effect is achieved. According to the system and the method, the photovoltaic heat collection based on the nanofluid can be better realized, the comprehensive utilization efficiency is improved, and an effective solution is provided for the problem that the stability of the graphene nanofluid in the actual use process is poor.
Description
Technical field [0001] The invention relates to the technical field of solar heat collection, in particular to a graphene nanofluid-based anti-precipitation solar photothermal system. Background technique [0002] With the energy crisis and environmental pollution becoming more and more serious, there is an urgent need to develop efficient and clean energy utilization methods. As a sustainable clean energy source, solar energy has received widespread attention. However, the discontinuity of solar energy in space and time makes the use of solar energy difficult. Based on this background, solar thermal utilization technology is proposed. The basic principle is to absorb solar radiation energy through a heat collection system and convert it into heat energy for use, which can effectively Convert solar energy and use it. However, the current working medium in solar heat exchangers is mostly water, which has poor heat transfer performance. The latest research shows that solar heat ex...
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Login to View More IPC IPC(8): F24S10/30F24S50/00F24S80/20B01F7/16
CPCF24S10/30F24S50/00F24S80/20B01F27/808Y02E10/44
Inventor 饶中浩房慧刘昌会庞晓文
Owner CHINA UNIV OF MINING & TECH